2681565450673 has 8 divisors (see below), whose sum is σ = 2747255847336. Its totient is φ = 2616434121600.

The previous prime is 2681565450667. The next prime is 2681565450689. The reversal of 2681565450673 is 3760545651862.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 13625425984 + 2667940024689 = 116728^2 + 1633383^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2681565450673 is a prime.

It is a super-5 number, since 5×2681565450673⁵ (a number of 63 digits) contains 55555 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2681565450653) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 139757188 + ... + 139776373.

It is an arithmetic number, because the mean of its divisors is an integer number (343406980917).

Almost surely, 2^{2681565450673} is an apocalyptic number.

It is an amenable number.

2681565450673 is a deficient number, since it is larger than the sum of its proper divisors (65690396663).

2681565450673 is a wasteful number, since it uses less digits than its factorization.

2681565450673 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 279533795.

The product of its (nonzero) digits is 36288000, while the sum is 58.

The spelling of 2681565450673 in words is "two trillion, six hundred eighty-one billion, five hundred sixty-five million, four hundred fifty thousand, six hundred seventy-three".